Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 208, NWS Philadelphia/Mount Holly

July 6, 2019Delaware County, Pennsylvania; Gloucester County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2019, 5:04 PM EDT for Delaware County, Pennsylvania; Gloucester County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2019, 5:04 PM EDT (21:04 UTC)
Expired
Jul 6, 2019, 5:21 PM EDT
In force
17 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 21:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 196 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2019-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 281 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2019-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
281 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
998 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

080 
WUUS51 KPHI 062104
SVRPHI
DEC003-NJC015-033-PAC045-062145-
/O.NEW.KPHI.SV.W.0208.190706T2104Z-190706T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
504 PM EDT Sat Jul 6 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern New Castle County in northern Delaware...
  North central Salem County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Southeastern Delaware County in southeastern Pennsylvania...

* Until 545 PM EDT.

* At 503 PM EDT, a severe thunderstorm was located over Chester
  Township, or 9 miles northeast of Wilmington, moving east at 15
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Chester, West Deptford, Woodbury, Carneys Point, Folcroft,
  Swarthmore, Paulsboro, Penns Grove, Swedesboro, Arden, Beckett,
  Nether Providence Township, Chester Township, Philadelphia
  International Arpt, Gibbstown, Chelsea, Brookhaven, Ridley Park,
  Prospect Park and Norwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

This thunderstorm is capable of producing all types of severe 
weather including destructive straight line winds and tornadoes. 
Move quickly to a safe shelter such as an interior room, a bathroom, 
closet or basement.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3977 7552 3988 7546 3992 7542 3985 7516
      3966 7536
TIME...MOT...LOC 2103Z 291DEG 13KT 3982 7541 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

MPS
1 follow-up statement
797 
WWUS51 KPHI 062121
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
521 PM EDT Sat Jul 6 2019

DEC003-NJC015-033-PAC045-062130-
/O.CAN.KPHI.SV.W.0208.000000T0000Z-190706T2145Z/
New Castle DE-Salem NJ-Gloucester NJ-Delaware PA-
521 PM EDT Sat Jul 6 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE...
NORTH CENTRAL SALEM...NORTHWESTERN GLOUCESTER AND SOUTHEASTERN
DELAWARE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However, heavy rain is 
still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 3977 7552 3988 7546 3992 7542 3985 7516
      3966 7536
TIME...MOT...LOC 2117Z 291DEG 13KT 3980 7533 

$$

MPS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 3:43 PM EDTSevere Thunderstorm WarningPHINorthampton47 min
Jul 6, 3:55 PM EDTTornado WarningPHIDelaware, Philadelphia50 min
Jul 6, 4:28 PM EDTSevere Thunderstorm WarningPHIBucks21 min
Jul 6, 4:41 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton49 min
Jul 6, 4:45 PM EDTAreal Flood AdvisoryPHIBucks, Delaware, Montgomery, Philadelphia4 hr
Jul 6, 4:54 PM EDTAreal Flood AdvisoryPHIBucks, Chester, Montgomery4 hr
Jul 6, 5:25 PM EDTSevere Thunderstorm WarningPHIBucks50 min
Jul 6, 5:36 PM EDTTornado WarningPHIBucks24 min
Jul 6, 5:44 PM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton4 hr
Jul 6, 5:49 PM EDTAreal Flood AdvisoryPHIChester, Delaware, Montgomery4 hr
Jul 6, 6:13 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery, Philadelphia15 min
Jul 6, 6:22 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton38 min
Jul 6, 6:42 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Philadelphia30 min
Jul 6, 6:49 PM EDTFlash Flood WarningPHIMonroe, Northampton3 hr
Jul 6, 6:53 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more67 min
Jul 6, 7:45 PM EDTSpecial Weather StatementPHIBucks, Chester, Delaware, Montgomery, Philadelphia45 min
Jul 6, 1:28 PM EDTAreal Flood AdvisoryPHIOcean3 hr
Jul 6, 1:46 PM EDTFlash Flood WarningPHIOcean4 hr
Jul 6, 1:52 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:05 PM EDTSpecial Weather StatementPHIBurlington25 min
Jul 6, 2:06 PM EDTSpecial Weather StatementPHIMonmouth24 min
Jul 6, 2:07 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:10 PM EDTSpecial Weather StatementPHIOcean35 min
Jul 6, 2:13 PM EDTSpecial Weather StatementPHICumberland47 min
Jul 6, 2:17 PM EDTAreal Flood AdvisoryPHIBurlington, Camden2 hr
Jul 6, 2:22 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Ocean28 min
Jul 6, 2:26 PM EDTSevere Thunderstorm WarningPHIMonmouth34 min
Jul 6, 2:28 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean47 min
Jul 6, 2:29 PM EDTSpecial Marine WarningPHI61 min
Jul 6, 2:40 PM EDTSpecial Marine WarningPHI31 min
Jul 6, 2:58 PM EDTSpecial Marine WarningPHI62 min
Jul 6, 3:04 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Ocean26 min
Jul 6, 3:22 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean37 min
Jul 6, 4:08 PM EDTTornado WarningPHIHunterdon25 min
Jul 6, 4:39 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem32 min
Jul 6, 4:49 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Sussex, Warren4 hr
Jul 6, 5:32 PM EDTFlash Flood WarningPHIWarren4 hr
Jul 6, 7:33 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem42 min
Jul 6, 6:00 PM EDTSevere Thunderstorm WarningPHIKent, Sussex29 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2019Severe Thunderstorm Warnings in Pennsylvania, 2019Severe Thunderstorm Warnings in Delaware, 2019Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.